>> >So what do you call the plug on a 'walkman' headphone? We'd call it a 3
>> >pole (or 'stereo') 3.5mm jack plug.
>>
>> Here when it's not called 3.5mm, it's called 1/8th inch. And the 2.5mm
>> version is 3/32 inch.
>Yes, but what do you call that type of connector? Is it a 'phone plug'
>even though it's not 1/4" in diameter, or what?
Yep, it's still a "phone plug", often listed as a "mini phone plug".
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
--- allisonp <allisonp(a)world.std.com> wrote:
> 74C92x is TI and you need to find a TI or maybe motorola CMOS databook
> CA1980ish.
> >NS 74C921...
These are not TI, they are Nat Semi as indicated by the double squiggly
lines before the number. In any case, if I have the relevant data book,
it's backed way far away in a box somewhere.
Thanks to all for all the info.
-ethan
=====
Even though my old e-mail address is no longer going to
vanish, please note my new public address: erd(a)iname.com
The original webpage address is still going away. The
permanent home is: http://penguincentral.com/
See http://ohio.voyager.net/ for details.
__________________________________________________
Do You Yahoo!?
Talk to your friends online with Yahoo! Messenger.
http://im.yahoo.com
Does anybody know where (if?) there is a dedicated website for the Acorn A4
laptop? All my searching turned up nil.
____________________________________________________________
David Vohs, Digital Archaeologist & Computer Historian.
Computer Collection:
"Triumph": Commodore 64C, 1802, 1541, FSD-1, GeoRAM 512, Okimate 20.
"Leela": Macintosh 128 (Plus upgrade), Nova SCSI HDD, Imagewriter II.
"Delorean": TI-99/4A.
"Monolith": Apple Macintosh Portable.
"Spectrum": Tandy Color Computer 3.
"Boombox": Sharp PC-7000.
____________________________________________________________
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I've been offered a cheap price on a tubeful of Signetics 82S123 bipolar
PROMs.
If memory serves (pun intended), these were used as boot ROMs for various
PDP-11's of the UniBus persuasion.
Is this so? If so, are they also useful for other classic apps? I'm
considering picking them up, but don't know for sure whether I'd be wasting
$10 or not...
Thanks in advance.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner and head honcho, Blue Feather Technologies
http://www.bluefeathertech.com // E-mail: kyrrin(a)bluefeathertech.com
Amateur Radio: WD6EOS since Dec. '77
"Our science can only describe an object, event, or living thing in our
own human terms. It cannot, in any way, define any of them..."
A new version of Ersatz-11 is now available. V2.2 of the freeware Demo
version may be downloaded from www.dbit.com as usual, and commercial users
with current update subscriptions (or ones that expired only recently) will
be mailed update disks tomorrow.
Probably the most interesting addition for hobby users is the new VT11
vector graphic display processor emulation. Yes, it runs the Lunar Lander
game. It also works nicely with the GT ON command in older versions of
RT-11, as well as EDIT.SAV's scroller mode. A copy of Jack Burness's Lunar
Lander game which is all set up to run under the emulator is available at:
http://www.dbit.com/pub/e11/lunar/
Other changes which are visible even in the Demo version include the
SET CPU FIS and SET CPU EAE options, the Interlan NI1010A/NI2010A Ethernet
emulation, the built-in mini-assembler, and the overhauled manual.
The full commercial V2.2 release includes the above changes, plus it
adds a new DR11C/DRV11 emulation using TLC's DCI-1300 PCI board, which
is pin-compatible with the DR11C/DRV11. Also there's a new DH11/DM11BB
emulation, the RocketPort driver can handle ISA cards (used to be PCI only),
the SCSI disk driver can partition disks on any boundary, multiple serial
ports can be attached to the same emulated PDP-11 port (with duplicate
output and merged input), and the Q/Unibus adapter drivers allow subsetting
of the I/O page so you can have multiple adapters, to get a dual Q/Unibus
system, or two identical busses for distributing heavy DMA loads. The new
DMA-friendly BCI-2004 bus adapter is supported in addition to the older
BCI-2003/2103 and UPG-3600 boards. Also, the DEQNA emulation now supports
booting over the network.
Acrobat files containing the manuals for all three versions (Demo, Lite, full)
of E11 are available on the "Links" page on www.dbit.com. The Demo version's
manual .PDF file is also part of the self-extracting INSTALL.EXE archive, plus
it's available as a PostScript file at:
ftp://ftp.dbit.com/pub/e11/e11demo.ps
The E11/Linux port is nearing completion and will be released this summer,
however it will probably only be available in a commercial version.
John Wilson
D Bit
www.dbit.com
Yow! The things that happen to an overloaded email account... Well, I
finally started reading the digests for the list. I'm up to early
February now! Only a month left to catch up with.
Well, I finally found the perfect computer! It's an HP Vectra
486/25NI. When I was volunteering at the computer lab at
OMSI(http://www.omsi.edu/), my favorite computer was a Vectra 386.
They're just such cute computers! Well, here in Portland at the NW
PDX/Vaughn St. Wacky Willy's, they have probably two dozen Vectras of
various models(most are 486/25N or 33N) for $20 each. After looking
at them for a while, I noticed that the 25NI(the only one I saw, but
there may have been others) has a built-in 10Base-T ethernet port on
the back! Not only that, but it has an Overdrive socket that can
accept a 486DX2/66 or an Overdrive kit. Pretty good! It has 8MB RAM
and a 120MB hard drive, not too bad. It had Windows 3.1 on it, but it
would crash both when it started up(actually an unhappy mainframe
connection) and when it shutdown(Windows crash). I think they all had
Attachmate (I can't remember if those are 3270) network adapters in
them. Anyways, it got wiped and a fresh copy of DOS installed. Now
I'm happy, I finally have a useable PC(my PS/2 386's just weren't
good enough).
OK, so it's a bit new for you guys. They also had a Televideo
terminal and some HUGE IBM printer(I forget the model... coax
connector on back).
Now, to deal with my overcrowded basement. I need to get rid of some
stuff! To start off with, I have some terminals to get rid of. I
think I can dig out about 6 of them, maybe a few more I'm not sure.
They are the Wyse WY-99GT. Most of them are a little yellowed, but
they work fine. They're free for the taking, I just need some time to
find them all and match them with their keyboards. The only catch is
that you have to pick it up at my house in north Portland(just off of
I-5). Email me if you're interested and I'll let you know when
they're ready to go.
Back to reading another months worth of email digests...
--
/-------------------------------------------------------\
| http://jrollins.tripod.com/ rexstout(a)uswest.net |
| KD7BCY List admin for orham and ham-mac at www.qth.net |
| pdxham at www.onelist.com |
\-------------------------------------------------------/
On Apr 1, 22:26, Tony Duell wrote:
> The Spectrum uses a 'power connector', probably 2.5mm (but I've not
> measured it). The central pin of the part on the PCB is -ve, and the
> outer of the plug (cable mounted part) is therefore +ve.
>
> The ZX81 uses a 3.5mm jack socket (what you call a 'phone socket' across
> the Pond) for the power input. The tip is +ve and the sleeve is -ve.
Oops, looks like I was too hasty and grabbed the wrong PSU. I'm sure Tony
is right, now that I think about it. The ZX81 certainly uses a 3.5mm jack.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
On Apr 1, 13:09, Chris Kennedy wrote:
> Technoid(a)cheta.net wrote:
>
> > I ran accross a reference in the newsgroups that indicates the Toshiba
> > 3701b cdrom drive can be run on a sun box with the change of a single
> > jumper but what jumper.
>
> I've no ideal; all of my "Sun" CDROM drives are Toshiba but other than
> a factory test jumper and the ID jumpers there's nothing to suggest that
> they have hardware-selected block sizes.
Early Suns need the drive to be set for 512-byte blocks; later Sun boot
PROMs can issue the appropriate mode-select command if they detect the
drive is set to 2048-byte blocks.
XM3301 and XM3401 have two pairs of pads on the PCB near the jumper block;
these are normally both closed (bridged by a thin track) on drives sold for
the PC market, but both open for Suns. The pads are small semicircles,
labelled 0 and 1.
There's a very similar set of pads on an XM3601, but they don't change the
blocksize, at least not with standard Toshiba firmware. I don't know about
a 3701, as I don't have one.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
> Date: Sat, 01 Apr 2000 09:09:55 -0800
> From: Bruce Lane <kyrrin(a)bluefeathertech.com>
> Subject: PROMs offered: Should I take?
>
> I've been offered a cheap price on a tubeful of Signetics 82S123 bipolar
> PROMs. If memory serves (pun intended), these were used as boot ROMs for various
> PDP-11's of the UniBus persuasion.
> Is this so? If so, are they also useful for other classic apps? I'm
> considering picking them up, but don't know for sure whether I'd be wasting
> $10 or not...
> Thanks in advance.
The 82S123 is the installed monitor PROM in the Quest Super ELF and
it's a
great little PROM for any 1802 application. I believe most of the toggle
switch
monitors listed in the PE ELF articles will fit in 32 bytes. And since
the 1802
need external address latching to access more than 256 bytes, having
your
whole operating system in 32 bytes leaves plenty of space for
applications
on a 256 byte minimalist system. :)
--Doug
====================================================
Doug Coward dcoward(a)pressstart.com (work)
Sr. Software Eng. mranalog(a)home.com (home)
Press Start Inc. http://www.pressstart.com
Sunnyvale,CA
Curator
Analog Computer Museum and History Center
http://www.best.com/~dcoward/analog
====================================================
